For your information Breeze, skins are easier to mount on these teardrop crowns that on traditional crowns, I'm glad I got these crowns, they were in their time the deluxe model for Gon Bops. The side plates are all the same rectangular size, the macho being different as to where the lugs go thru, but is actually stronger than the other side plates. These drums are very light weight and the sound projection is very melodic. I have had my share of Gon Bops through the years, these are by far the best and the stronger built, it has to do with the fiberglass outer layer. My Gon Bops 1980 bongos has the same type of teardrop crown, at that time their most expensive bongo', very easy to mount skins and to cut them with a blade.